02 7.3 Towing Not So Good

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Dec 28, 2010 | 01:24 AM

#21

CSIPSD

Diesel Bomber

Joined: Sep 2007

Posts: 7,638

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From: Bend OR

Quote:

Originally Posted by TOWELD

truck has 35" tires (not a big difference)i bought the truck as is and am thinking about a 4:10 or a 4:30 but there still sould be a little more power there. If i unplug the waste gate vac line i make 25LBS of boost but when plugged in 19 max no more. Also on the ICP it is new it not stock the ICP in spliced in the the wiring y i dont know but it is aftermarket. i ask the guy i bought it from about the truck haing little supdder and he said just use some injecter cleaner and didnt do anything. by lookin at things the guy i bought it from addressed the problem (spuddering) but never fixed it. i fixed it by replacing the IPR VALVE

Sounds like some kind of ICP/10k/18k type mod... Pull it out for now. Go ahead and unplug the wastegate for now, it should pick up a bit of power.

You should have no issues towing those loads on 35's and you DO NOT want to go any bigger then 4.10's. I really dont think you would see anymore power and only worse mileage.

Again, need to get it scanned while driving to really get some good info. Might keep your eye out for a cheap superchips tuner to run or hit up one of our sponsers for a good chip.

Do you have a EGT gauge as well as a boost gauge?

Dec 28, 2010 | 09:12 AM

#22

TOWELD

Thread Starter

Diesel Fan

Joined: Dec 2010

Posts: 37

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so leave the 3:73's in there? and what about SCT i wanted to try them out... if anyone has personal experience with SCT let me know or anything that will get good power and MPG's i get pretty much 12 MPG no matter what

---AutoMerged DoublePost---

oh yah i have an EGT and Boost gauge

Last edited by TOWELD; Dec 28, 2010 at 09:12 AM. Reason: Automerged Doublepost

Dec 28, 2010 | 11:12 AM

#23

CSIPSD

Diesel Bomber

Joined: Sep 2007

Posts: 7,638

Likes: 638

From: Bend OR

Quote:

Originally Posted by TOWELD

A SCT tuner is fine, I would rather have a chip then any flash type tuner on a 7.3, chips give you more options then a flash tuner does.

What are your EGT's when pulling heavy?

Where is your EGT probe installed at?

Dec 28, 2010 | 11:17 AM

#24

0Diesel Dawgs Performance

FormerVendor

Joined: Mar 2007

Posts: 14,546

Likes: 843

From: Western NC

Re: 02 7.3 Towing Not So Good

Drop the SCT and get a 6pos Chip

Sent from my DROID2

Dec 28, 2010 | 12:34 PM

#25

Lange503

Diesel Bomber

Joined: Feb 2010

Posts: 1,058

Likes: 45

From: Vernal, Utah

a 6 pos. will be better you can switch tunes on the go, but if you only want one tune on the truck and know you don't and or wont change it often, an sct would be fine

Dec 29, 2010 | 12:04 AM

#26

TOWELD

Thread Starter

Diesel Fan

Joined: Dec 2010

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So I bought another scan tool and had a code wastegate performance somethin. So took off wastegate tightened it up and got some powerbac

k and it hits 24lbs boost so problem solved. Thanks to everyone for ur help but if ur truck ever becomes a slow powerless dog check ur wastegate

Jan 2, 2011 | 11:12 PM

#27

suckthefuel

Newbie

Joined: Jan 2011

Posts: 5

Likes: 0

from some of the truck i play with depending on year

if the waste gate is not working proberly you could have power loss

or if the waste gate is not set properly

and there is a tube under the turbo on the earlier 7.3 that will have blow by and that will

cause all sorts of power loss

the other problem there could be is you are running over size tires and if your speed has not been recalibrated it can send the computer awire on the late 7.3 they need all the sensors working proparly or your turbo may spool at a higher rpm and make it harder to mantain a speed with a load and or it could be fueling wrong if speed sensor is not right

these would be what i check first

i have had all the problems above and much more that cause power loss